CN105020265A - Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing - Google Patents
Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing Download PDFInfo
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- CN105020265A CN105020265A CN201510477992.1A CN201510477992A CN105020265A CN 105020265 A CN105020265 A CN 105020265A CN 201510477992 A CN201510477992 A CN 201510477992A CN 105020265 A CN105020265 A CN 105020265A
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- Prior art keywords
- bearing
- outer ring
- inner race
- bearing inner
- bearing outer
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/08—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/31—Wind motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
Abstract
The invention discloses a pitch bearing of a wind turbine generator. The pitch bearing of the wind turbine generator comprises a bearing inner ring, a bearing outer ring and a rolling body located between the bearing inner ring and the bearing outer ring. The vertical connection lips of the bearing inner ring and the bearing outer ring are each provided with a sealing ring. Sealing faces corresponding to the sealing rings are sealing faces processed through the stainless steel surfacing welding technology. Epoxy zinc-rich primer, epoxy micaceous iron oxide intermediate and fluorocarbon finish are sequentially sprayed on the surface of the bearing inner ring and the surface of the bearing outer ring. Solid molybdenum disulfide coatings are sprayed on the surfaces of driving teeth on the inner wall of the bearing inner ring. The invention further discloses an anti-corrosion processing method of the pitch bearing of the wind turbine generator. Due to the fact that the sealing lips are processed through the stainless steel surfacing welding technology and anti-corrosion processing is performed on the surface of the pitch bearing through triple anti-corrosion protection and the solid molybdenum disulfide coatings, the anti-corrosion performance of the pitch bearing is greatly improved, and the pitch beating can well meet the requirement of the offshore wind turbine generator. The pitch bearing of the wind turbine generator is low in cost, high in machining efficiency and beneficial to application and popularization.
Description
Technical field
The present invention relates to Wind turbines and become oar technical field, particularly relate to a kind of Wind turbines pitch variable bearings and its method for anticorrosion treatment.
Background technique
Offshore wind farm has aboundresources, gas-to electricity time long, not land occupation and suitable large-scale development feature, is the up-to-date forward position of global Wind Power Development." the 12 " ENERGY PLANNING formulated according to China and renewable energy sources planning; 2015; China will build up offshore wind farm 5,000,000 kilowatts; form the complete set technology of offshore wind farm and set up complete industrial chain; after 2015; China's offshore wind farm will enter the large-scale development stage, reach international advanced technology level.The year two thousand twenty China offshore wind farm will reach 3,000 ten thousand kilowatts.Therefore, offshore wind farm is the development trend in following wind-powered electricity generation field.
But, offshore wind turbine is faced with series of technical, wherein ocean environment humidity, the corrosion of highly-saline air to wind power generating set are very crucial problems, if this problem can not be well solved, offshore wind turbine will be difficult to the working life reaching design.
At present, for static and the parts be exposed in ocean environment air can adopt special anticorrosive paint, its antiseptic effect in ocean environment is ensured by the spraying method of priming paint+intermediate coat+finish paint, but relatively rotate and the parts be directly exposed in ocean environment air for having, because affecting by sealing is isostructural, require that part part surface is necessary for exposed surface, can not anticorrosion with painting paint, so be difficult to the antiseptic property ensureing this position.The inside and outside circle surface of pitch variable bearings of current offshore wind turbine and seal lip place thereof are all directly exposed in ocean environment air, do not do preservative treatment, if things go on like this, can there is corrosion in this position the earliest, corrosion can cause seal lip excessive wear, reduces the sealability of pitch variable bearings.In addition, if seriously corroded, the bearing capacity of whole pitch variable bearings can reduce, and finally causes bearing premature failure.
As can be seen here, above-mentioned existing Wind turbines pitch variable bearings and method for anticorrosion treatment thereof, on structure and method, obviously still have inconvenience and defect, and are urgently further improved.How to found the low new Wind turbines pitch variable bearings of a kind of favorable anti-corrosion effect, cost and its method for anticorrosion treatment, become the target that current industry pole need be improved.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of favorable anti-corrosion effect, Wind turbines pitch variable bearings that cost is low, can adapt to ocean environment, thus overcome the deficiency of existing Wind turbines pitch variable bearings antiseptic effect.
For solving the problems of the technologies described above, the invention provides a kind of Wind turbines pitch variable bearings, comprise bearing inner race, bearing outer ring and the rolling element between bearing inner race and bearing outer ring, the lip place that combines between the higher and lower levels of described bearing inner race and bearing outer ring is respectively equipped with seal ring, and the sealing surface corresponding with described seal ring is the sealing surface adopting the process of stainless steel bead-welding technology.
As a modification of the present invention, the surface of described bearing inner race and bearing outer ring is coated with epoxy zinc rich primer, epoxy micaceous iron intermediate coat and fluorine carbon finishing paint successively.
Further improvement, film thickness >=80 μm of described epoxy zinc rich primer; Film thickness >=240 μm of described epoxy micaceous iron intermediate coat; Film thickness >=60 μm of described fluorine carbon finishing paint.
Further improvement, the inwall of described bearing inner race is provided with driving gear, and described driving gear surface spraying has solid molybdenum disulfide coating.
Further improvement, described rolling element is fixed between bearing inner race and bearing outer ring by retainer, and described retainer surface adopts Teflon coated, and described rolling element adopts ceramic rolling element.
The technical problem that the present invention also will solve provides the Wind turbines pitch variable bearings method for anticorrosion treatment that a kind of anticorrosion process is simple, cost is low, make the pitch variable bearings through the method process adapt to ocean environment, thus overcome the deficiency of existing Wind turbines pitch variable bearings method for anticorrosion treatment.
For solving the problems of the technologies described above, the invention provides a kind of method for anticorrosion treatment of Wind turbines pitch variable bearings, described Wind turbines pitch variable bearings comprises bearing inner race, bearing outer ring and the rolling element between bearing inner race and bearing outer ring, the lip place that combines between the higher and lower levels of described bearing inner race and bearing outer ring is respectively equipped with seal ring, to described bearing inner race with the method for anticorrosion treatment at the lip place that combines between the higher and lower levels between bearing outer ring be: offer notch at described lip place and the corresponding sealing surface of seal ring of combining between the higher and lower levels, then by stainless steel bead-welding technology, described notch is processed.
Improve as one, also comprise the method for anticorrosion treatment to bearing outer ring and bearing inner race surface: first shot blast is done to the surface of the bearing outer ring machined and bearing inner race; Secondly, the bearing outer ring after shot blast and the surface of bearing inner race spray epoxy zinc rich primer, epoxy micaceous iron intermediate coat and fluorine carbon finishing paint successively.
Further improvement, film thickness >=80 μm of described epoxy zinc rich primer; Film thickness >=240 μm of described epoxy micaceous iron intermediate coat; Film thickness >=60 μm of described fluorine carbon finishing paint.
Further improvement, the inwall of described bearing inner race is provided with driving gear, to the method for anticorrosion treatment on described driving gear surface is: in described driving gear surface spraying solid molybdenum disulfide coating.
Further improvement, described rolling element is fixed between bearing inner race and bearing outer ring by retainer, and adopt the coated process of Teflon to described retainer surface, described rolling element adopts ceramic rolling element.
Adopt above-mentioned technological scheme, the present invention at least has the following advantages:
1. the present invention is by adopting the process of stainless steel bead-welding technology at the seal lip place of this pitch variable bearings, makes its seal lip place can meet sealing configuration to the high request being in contact with it position hardness and roughness, can improve again antiseptic property herein.
2. the present invention carries out preservative treatment by employing three heavy-duty anticorrosion protection to the body surfaces of pitch variable bearings, substantially increases the antiseptic property on this pitch variable bearings surface, adapts to the requirement of offshore wind farm unit well.
3. the present invention is by bearing inner race driving gear surface spraying solid molybdenum disulfide coating, increases adhesion, improves lubricity, more improve anti-corrosion protection.
4. the present invention is also by adopting ceramic rolling element and adopting the coated retainer of Teflon, improves the wear resistance of the bearing capacity of rolling element, antiseptic property and fender bracket.
5. the present invention is with low cost, work efficiency is high, is beneficial to and applies.
Accompanying drawing explanation
Above-mentioned is only the general introduction of technical solution of the present invention, and in order to better understand technological means of the present invention, below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.
Fig. 1 is the structural representation of Wind turbines pitch variable bearings of the present invention;
Fig. 2 is the sectional view of Wind turbines pitch variable bearings side of the present invention;
Fig. 3 is the partial enlarged drawing of I part in Fig. 2.
Embodiment
Visible with reference to attached Fig. 1 and 2, the present embodiment relates to a kind of pitch variable bearings of offshore wind turbine, this pitch variable bearings comprises bearing outer ring 1, bearing inner race 2 and rolling element 5, this rolling element 5 is fixed between bearing inner race 2 and bearing outer ring 1 by retainer 4, the inwall of this bearing inner race 2 is provided with driving gear 6, is beneficial to and the rotation becoming oar driving gear and engaged bearing inner race 2.This bearing inner race 2 is provided with seal ring 3 with the lip place that combines between the higher and lower levels of bearing outer ring 1, forms the upper-lower seal lip between bearing inner race 2 and bearing outer ring 1, to keep the sealability of rolling element 5 and retainer 4.
The main body of the present embodiment middle (center) bearing outer ring 1 and bearing inner race 2 all adopts processing and the good 42CrMo material of heat treatment process, through operation process such as the forging rolling of routine, rough turn, bore hole, mid frequency induction hardening and fine grindings, has good bearing capacity.
The present embodiment pitch variable bearings, in order to adapt to ocean humidity, highly-saline air ambient, has carried out good preservative treatment scheme, comprising:
1, adopt three heavy-duty anticorrosion protections to the preservative treatment of pitch variable bearings body surfaces
First, shot blast is done to the parts surface of the bearing outer ring 1 just machined and bearing inner race 2, increases the adhesion on its surface;
Secondly, the epoxy zinc rich primer of spraying paint film thickness >=80 μm successively, after priming paint is air-dry, the epoxy micaceous iron intermediate coat of spraying paint film thickness >=240 μm, the fluorine carbon finishing paint of last spraying paint film thickness >=60 μm.
After above-mentioned preservative treatment, the body surfaces of this bearing outer ring 1 and bearing inner race 2 situation of effectively preventing matrix corrosion can occur within projected life, adapts to the requirement of offshore wind farm unit well.
2, preservative treatment is carried out to the seal lip place between bearing outer ring 1 and bearing inner race 2
Visible with reference to accompanying drawing 2 and 3, the seal lip 1-2 of bearing outer ring 1 and bearing inner race 2,2-2 place adopt stainless steel bead-welding technology to process.Concrete steps are as follows:
First, notch is offered at the seal lip 1-2 of bearing outer ring 1 and bearing inner race 2,2-2 place;
Secondly, stainless steel welding stick material is adopted to fill this notch respectively;
Then, machining is carried out to this stainless steel built-up welding seal lip 1-2,2-2 place, makes its boundary dimension reach designing requirement.
After seal lip 1-2 between bearing outer ring 1 and bearing inner race 2,2-2 place carry out above-mentioned process, without the need to spraying paint and doing other process, and its surface roughness and surface hardness all can meet the requirement of seal ring 3; Again owing to making stainless steel as the exposed surface be exposed in ocean environment, there is very strong antiseptic power, ensure that the corrosion resistance of this pitch variable bearings.
3, to the preservative treatment of the surperficial 2-3 of the driving gear 6 of bearing inner race 2 inwall
The surperficial 2-3 of driving gear 6 of bearing inner race 2 inwall sprays solid molybdenum disulfide coating.The effect of this solid molybdenum disulfide coating comprises: 1. increase adhesion, and this pitch variable bearings is when becoming oar, and that the inwall driving gear 6 of bearing inner race 2 can not be caused to engage with change oar driving gear comes off; 2. strengthen lubricity, increase bearing inner race 2 inwall driving gear 6 and the lubricity becoming oar driving gear; 3. antisepsis, increases the anti-corrosion protection of the surperficial 2-3 of inwall driving gear 6 of bearing inner race 2.
4, in this pitch variable bearings, rolling element 5 adopts ceramic rolling element, has both added the bearing capacity of rolling element, strengthens again the antiseptic property of rolling element.
5, in this pitch variable bearings, retainer 4 surface adopts Teflon coated, considerably increases the wear resistance of fender bracket.
After the present embodiment offshore wind turbine pitch variable bearings adopts above-mentioned preservative treatment, improve the antiseptic property of pitch variable bearings on the whole, solve the roughness of seal ring surface of contact in offshore wind turbine pitch variable bearings, surface hardness requires with ocean environment to seal the contradiction being in contact with it face requirement for anticorrosion, the problem also solving offshore wind turbine pitch variable bearings surface and rolling element, retainer anticorrosion, wear-resisting simultaneously and carry.
Certainly, pitch variable bearings of the present invention, except can be applicable to offshore wind farm unit, also can be applicable to other in the high Wind turbines of requirement for anticorrosion or other field.
The above; it is only preferred embodiment of the present invention; not do any pro forma restriction to the present invention, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in protection scope of the present invention.
Claims (10)
1. a Wind turbines pitch variable bearings, comprise bearing inner race, bearing outer ring and the rolling element between bearing inner race and bearing outer ring, the lip place that combines between the higher and lower levels of described bearing inner race and bearing outer ring is respectively equipped with seal ring, it is characterized in that, the sealing surface corresponding with described seal ring is the sealing surface adopting the process of stainless steel bead-welding technology.
2. pitch variable bearings according to claim 1, is characterized in that, the surface of described bearing inner race and bearing outer ring is coated with epoxy zinc rich primer, epoxy micaceous iron intermediate coat and fluorine carbon finishing paint successively.
3. pitch variable bearings according to claim 2, is characterized in that, film thickness >=80 μm of described epoxy zinc rich primer; Film thickness >=240 μm of described epoxy micaceous iron intermediate coat; Film thickness >=60 μm of described fluorine carbon finishing paint.
4. pitch variable bearings according to claim 1, is characterized in that, the inwall of described bearing inner race is provided with driving gear, and described driving gear surface spraying has solid molybdenum disulfide coating.
5. pitch variable bearings according to claim 1, is characterized in that, described rolling element is fixed between bearing inner race and bearing outer ring by retainer, and described retainer surface adopts Teflon coated, and described rolling element adopts ceramic rolling element.
6. the method for anticorrosion treatment of a Wind turbines pitch variable bearings, described Wind turbines pitch variable bearings comprises bearing inner race, bearing outer ring and the rolling element between bearing inner race and bearing outer ring, the lip place that combines between the higher and lower levels of described bearing inner race and bearing outer ring is respectively equipped with seal ring, it is characterized in that, to described bearing inner race with the method for anticorrosion treatment at the lip place that combines between the higher and lower levels between bearing outer ring be: offer notch at described lip place and the corresponding sealing surface of seal ring of combining between the higher and lower levels, then by stainless steel bead-welding technology, described notch is processed.
7. pitch variable bearings method for anticorrosion treatment according to claim 6, is characterized in that, also comprises the method for anticorrosion treatment to bearing outer ring and bearing inner race surface: first do shot blast to the surface of the bearing outer ring machined and bearing inner race; Secondly, the bearing outer ring after shot blast and the surface of bearing inner race spray epoxy zinc rich primer, epoxy micaceous iron intermediate coat and fluorine carbon finishing paint successively.
8. pitch variable bearings method for anticorrosion treatment according to claim 7, is characterized in that, film thickness >=80 μm of described epoxy zinc rich primer; Film thickness >=240 μm of described epoxy micaceous iron intermediate coat; Film thickness >=60 μm of described fluorine carbon finishing paint.
9. pitch variable bearings method for anticorrosion treatment according to claim 6, is characterized in that, the inwall of described bearing inner race is provided with driving gear, to the method for anticorrosion treatment on described driving gear surface is: in described driving gear surface spraying solid molybdenum disulfide coating.
10. pitch variable bearings method for anticorrosion treatment according to claim 6, it is characterized in that, described rolling element is fixed between bearing inner race and bearing outer ring by retainer, and adopt the coated process of Teflon to described retainer surface, described rolling element adopts ceramic rolling element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477992.1A CN105020265A (en) | 2015-08-06 | 2015-08-06 | Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477992.1A CN105020265A (en) | 2015-08-06 | 2015-08-06 | Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing |
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| CN105020265A true CN105020265A (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510477992.1A Pending CN105020265A (en) | 2015-08-06 | 2015-08-06 | Pitch bearing of wind turbine generator and anti-corrosion processing method of pitch bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826865A (en) * | 2019-01-09 | 2019-05-31 | 烟台天成机械有限公司 | A kind of wind power generating set raceway maintenance grease maintenance-free method |
| CN110454506A (en) * | 2019-09-11 | 2019-11-15 | 新天绿色能源股份有限公司 | A kind of bearing seal structure of wind-driven generator |
| WO2019246389A1 (en) * | 2018-06-21 | 2019-12-26 | General Electric Company | Method for manufacturing a pitch bearing or a yaw bearing of a wind turbine via additive manufacturing |
| CN111042995A (en) * | 2019-12-30 | 2020-04-21 | 浙江大学 | Self-driven offshore wind power bearing salt spray prevention device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019246389A1 (en) * | 2018-06-21 | 2019-12-26 | General Electric Company | Method for manufacturing a pitch bearing or a yaw bearing of a wind turbine via additive manufacturing |
| CN112352101A (en) * | 2018-06-21 | 2021-02-09 | 通用电气公司 | Method of manufacturing a pitch or yaw bearing of a wind turbine via additive manufacturing |
| US11333200B2 (en) | 2018-06-21 | 2022-05-17 | General Electric Company | Method for manufacturing a pitch bearing or a yaw bearing of a wind turbine via additive manufacturing |
| CN109826865A (en) * | 2019-01-09 | 2019-05-31 | 烟台天成机械有限公司 | A kind of wind power generating set raceway maintenance grease maintenance-free method |
| CN110454506A (en) * | 2019-09-11 | 2019-11-15 | 新天绿色能源股份有限公司 | A kind of bearing seal structure of wind-driven generator |
| CN111042995A (en) * | 2019-12-30 | 2020-04-21 | 浙江大学 | Self-driven offshore wind power bearing salt spray prevention device |
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Inventor after: Chu Jingchun Inventor after: Hu Xuesong Inventor after: Dong Li Inventor after: Li Yingchang Inventor after: Zhao Shuang Inventor before: Hu Xuesong Inventor before: Chu Jingchun Inventor before: Dong Li Inventor before: Li Yingchang Inventor before: Zhao Shuang |
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Application publication date: 20151104 |